survey
文章汇总：很全
https://github.com/EvelynFan/AWESOME-FER
https://arxiv.org/pdf/1804.08348.pdf
https://blog.csdn.net/z349177893/article/details/86605140
https://github.com/WuJie1010/Facial-Expression-Recognition.Pytorch
数据集
https://blog.csdn.net/Code_Mart/article/details/92833599
